Tyler Andrews, an American mountaineer and trail runner, set a new fastest known time for ascending Mount Everest with supplemental oxygen in 9 hours and 55 minutes on May 27 and 28, 2026. The time beat the previous fastest speed ascent by Lakpa Gelu Sherpa in 2003, which was 10 hours and 56 minutes. Andrews trained around Everest for several years and made multiple prior speed attempts that were stopped by weather, insufficient bottled oxygen, and gear problems. The successful attempt occurred near the end of the spring climbing season. Everest’s climbing window is limited by the timing of the Khumbu Icefall route setup by local Sherpas and by the arrival of monsoon conditions. The route runs from Everest Base Camp through the Khumbu Icefall, Camps 1 through 4, the South Col, and up the ridgeline to the summit, totaling about 13.5 kilometers with roughly 3,500 meters of climbing.
"The route extends from Everest Base Camp, located at 5,364 meters (17,598 feet) altitude, through the Khumbu Icefall, past Camps 1 through 4, and onto the South Col before climbing up onto the massive ridgeline extending to the summit. All told, the route is something in the vicinity of 13.5 kilometers (8.4 miles) long from base camp to the summit, with around 3,500 meters (11,500 feet) of climbing through mountaineering terrain of all kinds."
Read at iRunFar
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